The production rate of emulsion plants is generally greater than demand; therefore, storage facilities make it possible to have longer production runs, thus improving plant productivity. Present day emulsions may be stored for up to several months without major changes in physical properties. It is advisable to use small diameter vertical storage tanks with a minimum horizontal cross section with a dip tube filling pipe which reaches to or near the bottom of the storage tank. Emulsions of different ionic types should never be mixed and tanks should be thoroughly cleaned before refilling with a different ionic type. Provisions should also be made to ensure proper agitation of stored emulsion to prevent settling, decantation or creaming. Emulsions are sensitive to frost which can cause irreversible breaking; therefore, provisions should also be made to prevent stored emulsion from freezing.